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Transient Storage Clearing Helper Collision Bug

Posted by Solidity Team on February 18, 2026

Security Alerts

On 2026-02-11, a bug in the Solidity code generator was reported by Hexens. The bug affects compiler versions 0.8.28 through 0.8.33 when using the IR pipeline. When a contract clears both a persistent and a transient storage variable of the same type, the compiler will emit the wrong opcode (sstore instead of tstore, or vice versa) for one of these operations, because the generated Yul helper functions share the same name and one overwrites the other. We assign this bug a severity of...

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Solidity 0.8.34 Release Announcement

Posted by Solidity Team on February 18, 2026

Releases

Today we are releasing version 0.8.34 of the Solidity Compiler. This is a bugfix release that patches an important bug of high severity affecting clearing of storage and transient storage variables in the IR pipeline. If your code does not use delete on a transient state variable, your contract is not affected. The affected pattern has proven to be very rare in practice - only three deployed contracts were found across all EVM-compatible chains. The respective teams have been notified. Projects that compile...

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Annual Solidity Developer Survey is Live!

Posted by Jacob Czepluch on February 10, 2026

Announcements

The annual Solidity Developer Survey is now live, and we need your input! Take 5 minutes to share your experience and help us prioritize language design, performance improvements, and developer experience enhancements for the year ahead. We're already working on frequently requested features like eliminating stack-too-deep errors, performance optimization, and stronger debugging tooling – with delivery targeted for H1 2026. Your feedback will help us refine priorities and identify what matters most. Check out our latest roadmap update: 2026 Argot Roadmap Update 📝 Take...

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Solidity 0.8.32/0.8.33 Release Announcement

Posted by Solidity Team on December 18, 2025

Releases

Today we are releasing versions 0.8.32 and 0.8.33 of the Solidity Compiler. 0.8.32 is a bugfix release that patches an important bug of low severity. It also resolves an issue that was hampering the use of modules as namespaces for events and errors. 0.8.33 contains a hotfix for a backwards-incompatible change unintentionally introduced by 0.8.32 that was only discovered shortly after the release was tagged. Important Bugfixes Lost Storage Array Write On Slot Overflow A bug affecting operations that involve clearing of or copying from arrays...

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Lost Storage Array Write on Slot Overflow Bug

Posted by Solidity Team on December 18, 2025

Security Alerts

On November 10, 2024, a bug in the Solidity code generator was found by @Audittens. The bug was initially reported to affect deletion and partial assignment operations on fixed-length storage arrays that cross the 2**256-slot boundary. Two instances were reported: one in the IR pipeline and one in the evmasm pipeline. During our further investigation, we discovered a third instance affecting copying from arrays placed at the storage boundary. The effect of the bug is that such storage cleanup or copy operations may not...

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Solidity Summit 2025 Recap

Posted by Solidity Team on December 4, 2025

Announcements

The 2025 edition of the Solidity Summit took place in Buenos Aires during Devconnect, gathering around 350 participants from across the ecosystem. The event brought together language designers and compiler engineers - but also tooling authors, security experts, educators, and long-time Solidity power users. Attendees had the chance to get up to speed with the latest language proposals and new features, hear updates from the ecosystem, and learn from teams building on Solidity at scale. A central message from the Solidity...

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Solidity 0.8.31 Release Announcement

Posted by Solidity Team on December 3, 2025

Releases

Solidity 0.8.31 Release Announcement We are excited to announce the release of the Solidity Compiler v0.8.31! This version of the compiler brings support for the new EVM features introduced by the Fusaka network upgrade, extends the functionality of storage layout specifiers and deprecates the first batch of features scheduled for removal in the 0.9.0 breaking release. We are also adding official ARM Linux builds. Notable Features and Changes Fusaka Support osaka by Default With Fusaka scheduled to go on the mainnet, we are making it the default...

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Core Solidity Deep Dive

Posted by Solidity Team on November 14, 2025

Announcements

Solidity is the most widely used smart contract language. It is robust, trustworthy, and today secures hundreds of billions of dollars of value. We are proud of this success, and its track record of secure code generation. Users of Solidity will however be keenly aware of some of its limitations. The type system often lacks the expressiveness to produce reusable library code or enforce core safety properties. The language has very limited support for compile time evaluation. Many features are implemented in an inconsistent manner,...

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The Road to Core Solidity

Posted by Solidity Team on October 21, 2025

Announcements

The Road to Core Solidity Solidity has just reached its 10-year mark. This is a perfect opportunity for us to present "The Road to Core Solidity", a series of blog posts through which we share where we are headed with the language. In this series we want to show the community how we see the project's roadmap in the long run. While we are quite confident about its general direction, many details are not set in stone. It is as much a presentation of what...

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Solidity Summit 2025: Hola Argentina!

Posted by Vishwa Mehta on August 26, 2025

Announcements

The Solidity Summit has returned! Following the successful organisation of Solidity Summit 2023 in Türkiye, we are pleased to announce another in-person edition of the event in 2025. Solidity Summit 2025 will be a part of DevConnect this year and will take place on Tue, 18 Nov, 2025 in Buenos Aires, Argentina. What can you expect at Solidity Summit 2025? The Solidity Summit is a collaborative conference that focuses on Solidity's future. It is a gathering of advanced Solidity users and other Solidity...

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Solidity 0.8.30 Release Announcement

Posted by Solidity Team on May 7, 2025

Releases

We are releasing the Solidity Compiler v0.8.30. This latest version is a maintenance release in light of the Pectra Ethereum network upgrade scheduled for May 7, 2025 and changes the default EVM version from cancun to prague. Pectra is an Ethereum protocol upgrade, following Dencun, that brings new functionality and changes to both the execution and consensus layer of the Ethereum network. Read more in the Pectra Mainnet Announcement. Notable EIPs Let's look at some of the EIPs among the list of changes introduced by...

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